Jeremiah 1:5 says that Jeremiah was appointed as a prophet to the nations. It appears that jeremiah1five believes he too has been appointed as a prophet. Indeed he is a prophet, a false prophet, who continually contradicts the teachings of Paul and the Bible. Paul spoke of men like him in Galatians 1:6-9:
"I am amazed that you are so quickly deserting Him who called you by the grace of Christ, for a different gospel, which is not just another account; but there are some who are disturbing you and want to distort the gospel of Christ. But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed! As we have said before, even now I say again: if anyone is preaching to you a gospel contrary to what you received, he is to be accursed!"
He gloats over supposedly being Jewish in the flesh, even though there is absolutely no one today who could prove that they were Jewish in the flesh. The Jews have intermarried with Gentiles since the day they left Egypt. In fact some of them probably intermarried with Egyptians while they were there, because the scripture says that in the Exodus, "a mixed multitude also went up with them". Then the northern ten tribes were exiled to Assyria, never to return, so we know they intermarried. Then the southern tribes, Judah and Benjamin, were taken to Babylon, where again, they intermarried. We know that the Samaritans had intermarried with Gentiles. When Jews came back from Babylon, many stayed behind, probably the majority, so they again intermarried.
A pure 100% Jew in the flesh doesn't even exist.
But even if there were such a person, so what? God is not a racist. Any and all persons have the privilege of becoming heirs of the promises given to Abraham, which Paul said several times. How is that possible? By the fact that all people can also enter into the blessing of the New Covenant by grace through faith. Obviously, it doesn't matter whether you're Jewish in the flesh or not, because nobody really knows, nor does God care - He is able to raise up children of Abraham from stones. But even if you could know and you were 100% Jewish in the flesh, the kingdom of God was taken away from you, Jesus said, and was given to a nation producing the fruit of it, the body of Christ. Then he proved it by having Jerusalem and the temple destroyed, the Jews who rejected Jesus, slaughtered, and any who survived were taken captive and scattered all over the globe. That was the end of Israel, as a chosen people of God.
Israel today does not consist of the people of God -sure, there are Jews there who accept Jesus as their Messiah, but the nation is secular, they are not a theocracy, God is not their ruler, there's no temple with God's presence in it, there's no Holy of Holies, there's no longer priests from the tribe of Aaron - any Jew who thinks he is, is deceived. There's no Ark of the Covenant, no tablets of stone with the ten commandments on them, no jar of manna, no rod of Aaron -all of that is gone, never to be restored. Even if the Jews were to build a third temple, it wouldn't be God commanding them to do so, and they cannot created a genuine Ark of the Covenant, and genuine tablets, or genuine priests. Their will never be legitimate animal sacrifices again, because Christ "put a stop to sacrifice and grain offering" Daniel 9:27 by sacrificing Himself.
Let's listen to the New Testament and the words of Jesus and His apostles for our doctrine, not people who twist their words and their message.